LAC 33:V.106. Hazardous Waste Determination for Contaminated Media

A. Except as otherwise provided in this Section, environmental media that contain hazardous waste subject to regulation under LAC 33:V.4901 or LAC 33:V.4903, shall be managed as hazardous waste. An environmental medium (soil/sediment, surface water, or groundwater) no longer contains a hazardous waste when: 1. the concentration of the hazardous constituent that serves as the basis for the waste being listed as hazardous (as defined in LAC 33:V.109 or as determined by the department on a case-by-case basis, e.g., creosote) remaining in the medium meets the appropriate standards described in this Section; and 2. the medium no longer exhibits any of the characteristics of hazardous waste identified in LAC 33:V.4903. Land disposal treatment standards (LAC 33:V.2299) shall continue to apply to contaminated environmental media that are treated and then determined to no longer contain hazardous waste. Contaminated environmental media determined not to contain any hazardous waste prior to treatment are not subject to any RCRA Subtitle C requirement, including the standards in LAC 33:V.2299. B. Nonhazardous Environmental Medium (NHEM) Determination 1. Upon written request, the department may make a site-specific determination that an environmental medium contaminated with a listed hazardous waste at a concentration of the hazardous constituent at or below the level described in this Section no longer contains hazardous waste. Such a determination shall be known as a NHEM determination. A site-specific NHEM determination may be granted by the department contingent upon management of the environmental medium in accordance with any institutional control or other requirement described in the letter granting the request. 2. When a NHEM determination would be useful to expedite site remediation, a written request and payment of the fee in accordance with LAC 33:V.5147 may be submitted to the Office of Environmental Services. The request must demonstrate application of the process described in Paragraphs B.3-4 of this Section and that land disposal treatment standards are met when applicable. 3. A NHEM determination does not authorize the placement of contaminated media in, or establish remedial standards for, a particular area. Approval for placement of the contaminated medium in a specific area must be obtained from the Office of Environmental Services, unless it is otherwise allowed by regulation. Remedial standards for areas of contamination shall be established in accordance with the Risk Evaluation/Corrective Action Program (RECAP) as incorporated by reference in LAC 33:I.1307. 4. The identification, development, and application of the standards for media to be determined to no longer contain hazardous waste shall comply with the following process. a. Determine the area of investigation (AOI). The AOI is a zone contiguous to and including impacted media, defined vertically and horizontally by the presence of one or more constituents in concentrations exceeding a limiting standard. b. Identify the area of investigation concentration (AOIC). The AOIC is to be identified by the maximum detected concentration of the constituent of concern (COC) in the AOI or the upper bound estimate (e.g. upper confidence limit) of the arithmetic mean concentration of the COC. NOTE: The department recommends that the upper bound estimate of the arithmetic mean concentration be identified as the concentration recommended by the ProUCL program, a software program available from EPA’s Technical Support Center for Monitoring and Site Characterization (www.epa.gov/nerlesd1/tsc/form.htm). c. Determine the soil standard (SoilNHEM). The soil standards are presented in Table 1 of this Section. For a constituent not included in Table 1, the applicant shall calculate a value using the appropriate equation and input values from LAC 33:V.199.Appendix A. Compare the soil standard to the AOIC. If the AOIC detected for a COC does not exceed the soil standard, then a NHEM determination may be made. d. Identify the groundwater exposure concentration (EC). The EC shall be identified as the maximum concentration of COC detected in the groundwater AOI. e. Determine the groundwater standard (GWNHEM). The groundwater standards are presented in Table 1 of this Section. If a detected groundwater constituent cannot be found in Table 1, then the maximum contaminant level (MCL), contained in the National Primary Drinking Water regulations (40 CFR Part 141), multiplied by 100 is to be used as the groundwater standard. If an MCL is not available then a groundwater standard is to be calculated in accordance with appropriate equations and input values from LAC 33:V.199.Appendix A. Compare the groundwater EC to the groundwater standard. If quantitative values for constituents are less than the limiting standards, the groundwater may qualify for a NHEM determination. Table 1. Soil and Groundwater Standards Compound | CAS # | SoilNHEM (mg/kg) | GWNHEM (mg/l) Acenaphthene | 83-32-9 | 6.1E+05 | 3.7E+02 Acenaphthylene | 208-96-8 | 5.1E+05 | 3.7E+02 Acetone | 67-64-1 | 1.4E+05 | 6.1E+02 Aldrin | 309-00-2 | 1.3E+00 | 3.9E-03 Aniline | 62-53-3 | 1.7E+03 | 1.2E+01 Anthracene | 120-12-7 | 1.0E+06 | 1.8E+03 Antimony | 7440-36-0 | 8.2E+03 | 6.0E-01 Arsenic | 7440-38-2 | 2.7E+01 | 1.0E+00 Barium | 7440-39-3 | 1.0E+06 | 2.0E+02 Benzene | 71-43-2 | 3.1E+01 | 5.0E-01 Benz(a)anthracene | 56-55-3 | 2.9E+01 | 9.1E-02 Benzo(a)pyrene | 50-32-8 | 2.9E+00 | 2.0E-02 Benzo(b)fluoranthene | 205-99-2 | 2.9E+01 | 9.1E-02 Benzo(k)fluoranthene | 207-08-9 | 2.9E+02 | 9.1E-01 Beryllium | 7440-41-7 | 4.1E+04 | 4.0E-01 Biphenyl,1,1- | 92-52-4 | 4.4E+05 | 3.0E+02 Bis(2-chloroethyl)ether | 111-44-4 | 1.1E+01 | 9.6E-03 Bis(2-chloroisopropyl)ether | 108-60-1 | 1.7E+02 | 2.7E-01 Bis(2-ethyl-hexyl)phthalate | 117-81-7 | 1.7E+03 | 6.0E-01 Bromodichloromethane | 75-27-4 | 4.2E+01 | 1.0E+01 Bromoform | 75-25-2 | 1.8E+03 | 1.0E+01 Bromomethane | 74-83-9 | 3.0E+02 | 8.7E+00 Butyl benzyl phthalate | 85-68-7 | 1.0E+06 | 7.3E+03 Cadmium | 7440-43-9 | 1.0E+04 | 5.0E-01 Carbon Disulfide | 75-15-0 | 2.5E+04 | 1.0E+03 Carbon Tetrachloride | 56-23-5 | 1.1E+01 | 5.0E-01 Chlordane | 57-74-9 | 1.0E+02 | 2.0E-01 Chloroaniline,p- | 106-47-8 | 1.7E+04 | 1.5E+02 Chlorobenzene | 108-90-7 | 1.2E+04 | 1.0E+01 Chlorodibromomethane | 124-48-1 | 5.4E+01 | 1.0E+01 Chloroethane (Ethylchloride) | 75-00-3 | 8.2E+01 | 3.8E+00 Chloroform | 67-66-3 | 1.2E+01 | 1.0E+01 Chloromethane | 74-87-3 | 7.3E+01 | 1.5E+00 Chloronaphthalene,2- | 91-58-7 | 8.3E+05 | 4.9E+02 Chlorophenol,2- | 95-57-8 | 1.4E+04 | 3.0E+01 Chromium(III) | 16065-83-1 | 1.0E+06 | 1.0E+01 Chromium(VI) | 18540-29-97 | 6.1E+04 | 1.0E+01 Chrysene | 218-01-9 | 2.9E+03 | 9.1E+00 Cobalt | 7440-48-4 | 1.0E+06 | 2.2E+03 Copper | 7440-50-8 | 8.2E+05 | 1.3E+02 Cyanide (free) | 57-12-5 | 3.6E+05 | 2.0E+01 DDD | 72-54-8 | 1.6E+02 | 2.8E-01 DDE | 72-55-9 | 1.1E+02 | 2.0E-01 DDT | 50-29-3 | 1.2E+02 | 2.0E-01 Dibenz(a,h)anthracene | 53-70-3 | 2.9E+00 | 9.1E-03 Dibenzofuran | 132-64-9 | 6.5E+04 | 2.4E+01 Dibromo-3-chloropropane,1,2- | 96-12-8 | 1.8E+01 | 2.0E-02 Dichlorobenzene,1,2- | 95-50-1 | 7.4E+04 | 6.0E+01 Dichlorobenzene,1,3- | 541-73-1 | 1.8E+03 | 5.5E+00 Dichlorobenzene,1,4- | 106-46-7 | 1.6E+02 | 7.5E+00 Dichlorobenzidine,3,3- | 91-94-1 | 4.2E+01 | 1.5E-01 Dichloroethane,1,1- | 75-34-3 | 4.7E+04 | 8.1E+02 Dichloroethane,1,2- | 107-06-2 | 1.8E+01 | 5.0E-01 Dichloroethene,1,1- | 75-35-4 | 9.1E+03 | 7.0E-01 Dichloroethene,cis,1,2- | 156-59-2 | 3.4E+03 | 7.0E+00 Dichloroethene,trans,1,2- | 156-60-5 | 4.8E+03 | 1.0E+01 Dichlorophenol,2,4- | 120-83-2 | 2.0E+04 | 1.1E+02 Dichloropropane,1,2- | 78-87-5 | 1.8E+01 | 5.0E-01 Dichloropropene,1,3- | 542-75-6 | 1.0E+02 | 3.9E-01 Dieldrin | 60-57-1 | 1.5E+00 | 4.1E-03 Diethylphthalate | 84-66-2 | 1.0E+06 | 2.9E+04 Dimethylphenol,2,4- | 105-67-9 | 1.1E+05 | 7.3E+02 Dimethylphthalate | 131-11-3 | 1.0E+06 | 3.7E+05 Di-n-octylphthalate | 117-84-0 | 3.5E+05 | 1.5E+03 Dinitrobenzene,1,3- | 99-65-0 | 5.0E+02 | 3.7E+00 Dinitrophenol,2,4- | 51-28-5 | 6.9E+03 | 7.3E+01 Dinitrotoluene,2,6- | 606-20-2 | 4.6E+03 | 3.7E+01 Dinitrotoluene,2,4- | 121-14-2 | 9.8E+03 | 7.3E+01 Dinoseb | 88-85-7 | 5.4E+03 | 7.0E-01 Endosulfan | 115-29-7 | 4.5E+04 | 2.2E+02 Endrin | 72-20-8 | 2.5E+03 | 2.0E-01 Ethyl benzene | 100-41-4 | 1.3E+05 | 7.0E+01 Fluoranthene | 206-44-0 | 2.9E+05 | 1.5E+03 Fluorene | 86-73-7 | 5.4E+05 | 2.4E+02 Heptachlor | 76-44-8 | 3.5E-01 | 4.0E-02 Heptachlor epoxide | 1024-57-3 | 2.6E+00 | 2.0E-02 Hexachlorobenzene | 118-74-1 | 2.0E+01 | 1.0E-01 Hexachlorobutadiene | 87-68-3 | 1.6E+02 | 8.5E-01 Hexachlorocyclohexane,alpha | 319-84-6 | 4.4E+00 | 1.1E-02 Hexachlorocyclohexane,beta | 319-85-7 | 1.6E+01 | 3.7E-02 Hexachlorocyclohexane,gamma | 58-89-9 | 2.0E+01 | 2.0E-02 Hexachlorocyclopentadiene | 77-47-4 | 9.4E+02 | 5.0E+00 Hexachloroethane | 67-72-1 | 1.4E+03 | 7.9E-01 Indeno(1,2,3-cd)pyrene | 193-39-5 | 2.9E+01 | 9.1E-02 Isobutyl alcohol | 78-83-1 | 6.2E+05 | 1.1E+04 Isophorone | 78-59-1 | 1.1E+04 | 7.0E+01 Lead (inorganic) | 7439-92-1 | 3.4E+04 | 1.5E+00 Mercury (inorganic) | 7487-94-7 | 6.1E+03 | 2.0E-01 Methoxychlor | 72-43-5 | 4.3E+04 | 4.0E+00 Methylene chloride | 75-09-2 | 4.4E+02 | 5.0E-01 Methyl ethyl ketone | 78-93-3 | 4.4E+05 | 1.9E+03 Methyl isobutyl ketone | 108-10-1 | 6.3E+05 | 2.0E+03 Methylnaphthalene,2- | 91-57-6 | 1.7E+04 | 6.2E+00 MTBE (methyl tert-butyl ether) | 1634-04-4 | 4.7E+05 | 2.0E+00 Naphthalene | 91-20-3 | 4.3E+03 | 6.2E+00 Nickel | 7440-02-0 | 4.1E+05 | 7.3E+02 Nitrate | 14797-55-8 | 1.0E+06 | 1.0E+03 Nitrite | 14797-65-0 | 1.0E+06 | 1.0E+02 Nitroaniline,2- | 88-74-4 | 5.2E+01 | 2.1E-01 Nitroaniline,3- | 99-09-2 | 1.4E+04 | 1.8E+01 Nitroaniline,4- | 100-01-6 | 1.0E+04 | 1.1E+02 Nitrobenzene | 98-95-3 | 2.5E+03 | 3.4E+00 Nitrophenol,4- | 100-02-7 | 3.3E+04 | 2.9E+02 Nitrosodi-n-propylamine,n- | 621-64-7 | 1.4E+00 | 9.5E-03 N-nitrosodiphenylamine | 86-30-6 | 4.0E+03 | 1.4E+01 Pentachlorophenol | 87-86-5 | 9.7E+01 | 1.0E-01 Phenanthrene | 85-01-8 | 1.0E+06 | 1.8E+03 Phenol | 108-95-2 | 1.0E+06 | 1.8E+03 Polychlorinated biphenyls | 1336-36-3 | 9.0E+00 | 5.0E-02 Pyrene | 129-00-0 | 5.6E+05 | 1.8E+02 Selenium | 7782-49-2 | 1.0E+05 | 5.0E+00 Silver | 7440-22-4 | 1.0E+05 | 1.8E+02 Styrene | 100-42-5 | 4.3E+05 | 1.0E+01 Tetrachlorobenzene,1,2,4,5- | 95-94-3 | 1.2E+03 | 1.1E+01 Tetrachloroethane,1,1,1,2- | 630-20-6 | 5.9E+01 | 4.3E-01 Tetrachloroethane,1,1,2,2- | 79-34-5 | 2.0E+01 | 5.5E-02 Tetrachloroethylene | 127-18-4 | 3.5E+02 | 5.0E-01 Tetrachlorophenol,2,3,4,6- | 58-90-2 | 1.7E+05 | 1.1E+03 Thallium | 7440-28-0 | 1.4E+03 | 2.0E-01 Toluene | 108-88-3 | 4.7E+04 | 1.0E+02 Toxaphene | 8001-35-2 | 2.2E+01 | 3.0E-01 Trichlorobenzene,1,2,4- | 120-82-1 | 1.2E+05 | 7.0E+00 Trichloroethane,1,1,1- | 71-55-6 | 7.0E+04 | 2.0E+01 Trichloroethane,1,1,2- | 79-00-5 | 4.3E+01 | 5.0E-01 Trichloroethene | 79-01-6 | 2.1E+00 | 5.0E-01 Trichlorofluoromethane | 75-69-4 | 2.6E+04 | 1.3E+03 Trichlorophenol,2,4,5- | 95-95-4 | 6.6E+05 | 3.7E+03 Trichlorophenol,2,4,6- | 88-06-2 | 1.7E+03 | 6.0E+00 Vanadium | 7440-62-2 | 1.4E+05 | 2.6E+02 Vinyl chloride | 75-01-4 | 7.9E+00 | 2.0E-01 Xylene(mixed) | 1330-20-7 | 1.2E+04 | 1.0E+03 Zinc | 7440-66-6 | 1.0E+06 | 1.1E+04 Aliphatics C6-C8 | NA | 1.0E+04 | 3.2E+04 Aliphatics >C8-C10 | NA | 1.0E+04 | 1.3E+03 Aliphatics >C10-C12 | NA | 1.0E+04 | 1.4E+03 Aliphatics >C12-C16 | NA | 1.0E+04 | 1.4E+03 Aliphatics >C16-C35 | NA | 1.0E+04 | 7.3E+04 Aromatics >C8-C10 | NA | 1.0E+04 | 3.4E+02 Aromatics >C10-C12 | NA | 1.0E+04 | 3.4E+02 Aromatics >C12-C16 | NA | 1.0E+04 | 3.4E+02 Aromatics >C16-C21 | NA | 1.0E+04 | 1.1E+03 Aromatics >C21-C35 | NA | 1.0E+04 | 1.1E+03 TPH-GRO (C6-C10) | NA | 1.0E+04 | 3.4E+02 TPH-DRO (C10-C28) | NA | 1.0E+04 | 3.4E+02 TPH-ORO (>C28) | NA | 1.0E+04 | 1.1E+03